package com.fjwt.gz.mch.util;

import cn.hutool.core.date.DateUtil;
import freemarker.template.Configuration;
import freemarker.template.Template;
import lombok.extern.slf4j.Slf4j;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.net.URLEncoder;
import java.util.Map;

@Slf4j
public class WordUtils {
    //配置信息,代码本身写的还是很可读的,就不过多注解了21
    private static Configuration configuration = null;
    //这里注意的是利用WordUtils1的类加载器动态获得模板文件的位置
//    private static final String templateFolder = WordUtils1.class.getClassLoader().getResource("/").getPath();
    private static String templateFolder= "/home/jrstyx/marketing/manager/templates";
//    private static String templateFolder= null;

    static {
        try {
            configuration = new Configuration();
            configuration.setDefaultEncoding("utf-8");
//            templateFolder = ClassUtils.getDefaultClassLoader().getResource("").getPath()+"templates/";
//            templateFolder = ClassUtils.getDefaultClassLoader().getResource("").getPath()+"templates/";
            templateFolder = FileUtil.toUNIXpath(templateFolder);
            configuration.setDirectoryForTemplateLoading(new File(templateFolder));
            System.out.println(templateFolder);
            log.info("系统文件路径：{}",templateFolder);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private WordUtils() {
        throw new AssertionError();
    }

    public static void exportMillCertificateWord(HttpServletRequest request, HttpServletResponse response, Map map, String title, String ftlFile) throws IOException {
        long time1 = DateUtil.current();
        Template freemarkerTemplate = configuration.getTemplate(ftlFile);
        File file = null;
        InputStream fin = null;
        ServletOutputStream out = null;
        try {
            // 调用工具类的createDoc方法生成Word文档
            file = createDoc(map, freemarkerTemplate);
            fin = new FileInputStream(file);

            response.setCharacterEncoding("utf-8");
            response.setContentType("application/msword");
            // 设置浏览器以下载的方式处理该文件名
            String fileName = time1 + ".doc";
            response.setHeader("Content-Disposition", "attachment;filename="
                    .concat(String.valueOf(URLEncoder.encode(fileName, "UTF-8"))));

            out = response.getOutputStream();
            byte[] buffer = new byte[1024];  // 缓冲区
            int bytesToRead = -1;
            // 通过循环将读入的Word文件的内容输出到浏览器中
            while ((bytesToRead = fin.read(buffer)) != -1) {
                out.write(buffer, 0, bytesToRead);
            }
        } finally {
            if (fin != null) fin.close();
            if (out != null) out.close();
            if (file != null) file.delete(); // 删除临时文件
        }
    }

    private static File createDoc(Map<?, ?> dataMap, Template template) {
        String name = "file.docx";
        File f = new File(name);
        Template t = template;
        try {
            // 这个地方不能使用FileWriter因为需要指定编码类型否则生成的Word文档会因为有无法识别的编码而无法打开
            Writer w = new OutputStreamWriter(new FileOutputStream(f), "utf-8");
            t.process(dataMap, w);
            w.close();
        } catch (Exception ex) {
            ex.printStackTrace();
            throw new RuntimeException(ex);
        }
        return f;
    }

}
